--  @testpoint:opengauss关键字prepared(非保留)，作为函数名

--关键字不带引号-成功
drop function if exists prepared;
create function prepared(i integer)
returns integer
as $$
begin
    return i+1;
end;
$$ language plpgsql;
/
drop function prepared;
--关键字带双引号-成功
drop function if exists "prepared";
create function "prepared"(i integer)
returns integer
as $$
begin
    return i+1;
end;
$$ language plpgsql;
/
drop function "prepared";
--关键字带单引号-合理报错
drop function if exists 'prepared';
create function 'prepared'(i integer)
returns integer
as $$
begin
    return i+1;
end;
$$ language plpgsql;
/
--关键字带反引号-合理报错
drop function if exists `prepared`;
create function `prepared`(i integer)
returns integer
as $$
begin
    return i+1;
end;
$$ language plpgsql;
/